Bolt-lock-receiver and barrel assembly



A118. 11, 1964 E. s. VARTANIAN E'rAl. 3,143,818

BoLT-LocxREcE1vER AND BARREL ASSEMBLY Filed May l, 1962 3 Sheets-Sheet 1 Om. v x\ o. Nm E Wm/ we .QN/#l f 4 \V m .9^ lllllllind,

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SN Rm ON T A NT E R VA mv S. m w D E JOSEPH A. BADAL! ATTORNEY Aug- 11 1954 E. s. VARTANIAN ETAL 3,143,818

BoLT-Locx-RECEIVER AND BARREL ASSEMBLY Filed May l, 1962 3 Sheets-Sheet 2 INVENTORS EDWIN S. VARTANIAN BY JOSEPH A. BADALI ATTORNEY ug- 11, 1964 E. s. VARTANIAN ETAL 3,143,818

l BoLT-LocK-RECEIVER AND BARREL ASSEMBLY Filed May 1, 1962 3 sheets-sheet s 50 A 47A 47 59 56 5 7 41 54 1111 4l 45' INVENTORSI EDWIN S VARTANIAN JOSEPH A. BADALI ATTO RN EY United States Patent O V 3,143,818 BOLT-LOCK-RECEIVER AND BARREL ASSEMBLY Edwin S. Vartanian, North Haven, and Joseph A. Badali,

Branford, Conn., assignors to Olin Mathieson Chemical Corporation, a corporation of Virginia Filed May 1, 1962, Ser. No. 191,531 Claims. (Cl. 42-21) This invention relates to firearms, and, in particular, relates to the operating mechanism for a lever actuated lirearm.

An object of this invention is to provide a novel lever actuated firearm which is simple in design, economical to manufacture, and which has a minimum number of piece parts, many of which can be used in other types of tirearms, such as semi-automatic and slide actuated firearms.

A further object of this invention is to provide a novel lever actuated firearm having means therein operative to render the firing mechanism inoperative, unless the iinger lever is in its fully closed position.

It is another object of this invention to provide a lever actuated firearm having the trigger mounted on a finger lever and movable therewith and having the finger lever mounted on the receiver by means of a pin which also functions as a safety button.

These, and other objects of this invention, will become more readily apparent from the following detailed description and the drawings in which:

FIGURE l is a section view showing the internal operating mechanism of the lever actuated firearms of the instant invention.

FIGURE 2 is an enlarged assembly view showing the finger lever and its associated structure pivotally secured to the hammer housing.

FIGURE 3 is an enlarged assembly view showing the finger lever, trigger, and lever arm of the instant invention.

FIGURE 4 is an enlarged sectional assembly view of the hammer housing and the parts associated therewith.

FIGURE 5 is an enlarged sectional view illustrating the relationship between the hammer housing, the iinger lever and sensing lever with its associated mechanism and showing the :finger lever in an open position and the sensing lever in a safe position.

FIGURE 6 is an enlargedsectional view similar to that shown in FIGURE 5 but showing the finger lever in its fully closed position abutting the hammer housing and the sensing lever in its firing position.

FIGURE 7 is an enlarged perspective view showing the details of the sensing lever of the instant invention.

FIGURE 8 is an enlarged view showing the safety button in detail.

Referring now to FIGURE l, there is shown a receiver generally designated 1, having a hollow interior opening on the bottom of the receiver. A barrel 2 is secured to the front of the receiver by means of a collar 3, which engages an abutment 4 on the barrel, and screw-threadedly engages the receiver as indicated at 5. The barrel 2 is provided with a chamber 6 to accommodate a cartridge therein. The barrel is further provided with an enlarged cavity 7 to accommodate the forward portion of a bolt assembly therein. A magazine tube 8 is positioned below the barrel by mounting means not shown. A bore 9 in the receiver communicates the open end of the magazine tube 8 with the hollow interior of the receiver. Magazine tube follower 1t! and a magazine spring 11 are provided to urge cartridges positioned in the magazine tube toward the receiver.

v A bolt assembly 12 is mounted in the receiver for reciprocation from a firing position as shown in FIGURE l, wherein the bolt is positioned in the forward part of the receiver to an ejecting position, wherein the bolt is 3,143,818 Patented Aug. 11, 1964 IEC reciprocated toward the rear wall 13 of said receiver. The bolt assembly, illustrated in FIGURE l, is described in detail in our co-pending application Sierial Number 178,972, filed March l2, 1962, and will not be described in detail here. The bolt assembly 12 has a generally rectangular body portion 14 and a tapered nose portion 15. The top face of the body portion 14 is recessed to accommodate a locking plate 16, which normally fits flush with the top face of said bolt. The locking plate 16 has a downward extending arm 17, which tits flush in a recess formed in the adjacent side wall of said bolt. The arm i7 is provided with a stud 18, the purpose of which will be discussed below. Bolt assembly 12 carries a tiring pin, extractor, and ejector which function as described in detail in the above mentioned co-pending application.

. The receiver 1 is provided with a recess 19 in the interior of the top wall to accommodate the locking plate 16 when the bolt assembly is in its forward firing position. When locking plate 16 engages recess 19, the bolt 12 is locked in the receiver. A butt stock 20 is secured to the rear of the receiver by fastening means 21 or the like.

A hammer housing generally indicated 30 is mounted in the receiver 1 by means of a pin 3l projecting forwardly from the hammer housing into a recess 32 in the receiver. A pin 33 positioned toward the rear of the hammer housing extends through the side walls of the receiver and through the side walls of the hammer housing to lock the hammer housing in the receiver. A feed guide 34 is mounted in the forward portion of the hammer housing 30 and has a throat portion 35, aligned with the bore 9, in the receiver, to guide a cartridge onto a carrier generally indicated 36 in FIGURE 4, which is pivotally mounted in the hammer housing by pin 37. The carrier is generally U-shaped and has a pair of arms 38 and 39, connected by a bite portion 40 (note FIG. 4). A spring 41 is mounted in the bottom of the feed guide and has a cap 42, which engages arm 38 of the carrier. Arm 39 of the carrier is engaged by the bolt 12 (note FIG. l) to movethe carrier to the cartridge receiving position shown in FIGURE l. As the bolt is movedrearwardly to its ejecting position, the arm 39 disengages from the bolt and a cartridge is lifted toward the chamber 6 by the upward movement of the carrier. Arm 38 of the carrier is recessed at 43 to accommodate the rim portion of a cartridge and to limit the rearward movement of the cartridge onto the carrier.

A pivot pin 44 is mounted in the side walls of thehamrner housing. A hammer 45 is mounted on the pin 44 for rotational movement about said pin 44. A spring 22 is interposed between the hammer 45 and the hammer housing and normally biases said hammer in a clockwise direction about the pivot 44.

A sensing lever generally indicated 46 is pivotally mounted in the rear portion of said hammer housing by pivot pin 47, supported in the side Walls of said hammer housing. The sensing lever 46 is shown in detail in FIG- URE 7 and comprises an arm 48 projecting forwardly of the pivotal mounting and an L-shaped arm 49'extending rearwardly of the pivotal mounting. Arms 48 and 49 are joined by a bridge portion 49A. An arm 50 is formed integral with the bridge portion 49A and extends "downwardly therefrom. A U-shaped member, generally indicated 51, has leg portions 52 and 53 connected by bite portion 54. Leg 53 is rigidly secured to arm 50. Elements 5t), 52, and 53 are apertured to accommodate a pivot pin 55. A sear 56 is pivotally mounted on pin 55. The sear 56 is provided with a hook portion 57 at one end which is adapted to engage a hook portion 58 on the hammer 4S. Spring 22 acts through hammer 45 and 4scar 56 to'urge sensing lever 46 in a counterclockwise direction about pivot 47 when hammer 45 engages sear 56. A light spring 59 is interposed between the bite portion 54 of the sensing lever and `the scar 56. Spring 59 imposes a force on the sear 56 which tends to rotate the sear in a clockwise direction, as viewed in FIGURE 1, relative to the sensing lever 46. The rotational movement of the scar 56, relative to the sensing lever 46, is limited by the engagement of projection 60 on the sear with bite portion 54 of the sensing lever. Arm 48 of the sensing lever extends along the outside wall of the hammer housing and has an inturned lug 61, which is engaged in an opening 62 in side wall of said hammer housing. The L-shaped arm 49 of the sensing lever extends downwardly through an opening 62A in the bottom of the hammer housing and engages with the finger lever in a manner which will be described in detail below.

A finger lever generally indicated 63 is shown in detail in FIGURE 3 and has pivotally secured thereto a trigger generally indicated 64. The trigger 64 is pivotally mounted on the linger lever 63 by means of a pivot pin 65 mounted in the finger lever. The trigger 64 has a finger engaageable portion 66 extending rearwardly of the pivot 65 and an extension 67 extending forwardly of the pivot 65. A lug 68 provided on the trigger is engageable with a projection 68A on scar 56 only when the sensing lever is in its operative position. The operative and inoperative positions of the sensing lever are discussed in detail below. Lug 68 releases sear 56 from engagement with hammer 45 when the trigger is manually pulled.

Finger lever 63 is bifurcated at its forward end to accommodate the projecting portion of the hammer housing to which it is pivotally secured. Rigidly secured to one side of the bifurcated end of finger lever 63 is a rigid arm 69. Arm 69 extends upwardly from the finger lever and is provided with a cam slot 70 engageable with stud 18 on arm 17 of the locking plate 16.

The finger lever 63 is pivotally secured to the hammer housing 30 as shown in FIGURE 2 by means of a safety button 71. Safety button 71 functions as the pivotal connection between the hammer housing and the finger lever and further functions as a safety device for locking trigger 64 in an inoperative position. Safety button 71 (as shown in FIG. 8) has a recessed central portion 72, which is generally aligned with extension 67 of the trigger 64. When recess -72 is aligned with extension 67, the trigger 64 is free to rotate about its pivotal mounting. Axial movement of the safety button, however, moves recess 72 out of alignment with extension 67; and the safety button 71 blocks the pivotal movement of trigger 64 and prevents firing of the gun.

When the hammer housing and finger lever are positioned in the receiver (as shown in FIG. 1), cam slot 70, in rigid arm 69, engages stud 18 on the downwardly extending arm 17 of the locking plate 16. Rotation of the finger lever 63 and rigid arm 69 about safety button 71, away from the hammer housing, is effective to reciprocate bolt assembly 12 which is interconnected with locking plate 16, from its firing position in the forward portion of the receiver to its ejecting position at the rear of the receiver. Cam slot 70 functions to move locking plate 16 into flush engagement with the bolt as the finger lever is initially moved away from the receiver and to change the rotational movement of the finger lever into longitudinal linear movement of the bolt assembly 12 in the receiver. Finger lever 63 is further provided with a pin 73 which is adapted to engage an inturned portion 74 of sensing lever 46 to actuate the sensing lever 46 when the finger lever is rotated about safety button 71 toward the hammer housing. The function of the sensing lever is described in detail in the operation of the firearm which is' presented below.

FIGURE 1 shows the firearm of this invention in firing position. A cartridge is positioned in chamber 6 and bolt assembly 12 abuts the cartridge and seals chamber 6. Locking plate 16 is engaged in recess 19 in the receiver, and the bolt assembly in locked in firing position. The

next cartridge, positioned in magazine 8, has been forced onto carrier arm 38 by the spring 11 and the magazine tube follower 10. Hammer 45 has been rotated rearwardly into engagement with scar 56. When trigger 64 is manually pulled, lug 68 on the trigger engages projection 68A on sear 56 and rotates the sear counterclock- Wise out of engagement with hammer 45. Hammer 45 is driven in a clockwise direction by the action of spring 22 and strikes the firing pin carried by the bolt assembly. The firing pin strikes the cartridge positioned in chamber 6 and the cartridge is fired. Finger lever 63 is then rotated in a counterclockwise direction about pivot 71 away from the receiver. Rigid arm 68, which is rigidly affixed to finger lever 63, rotates with the finger lever. The initial movement of rigid arm 69 causes locking plate 16 to be moved inwardly into flush engagement with the top of the bolt assembly 12. This movement is due to the configuration of the .cam slot 70, which is engaged by lug 18 carried on arm 17 of the locking plate 16. Continued movement of the finger lever 63 and rigid arm 69 about pivot 71, causes bolt assembly 12 to be moved rearwardly toward the end wall 13 of the receiver. Bolt assembly 12 engages hammer 45 and rotates said hammer in a counterclockwise direction towards engagement with the sear 56. As bolt assembly 12 contacts rear wall 13, the fired cartridge is ejected from the receiver in the manner disclosed in our above mentioned Co-pending application 178,972, filed March l2, 1962. The hook portion 57 of the sear 56 engages hook portion 58 of hammer 45 and the sear retains the hammer in its cocked position. As the bolt assembly 12 is being moved rearwardly toward its ejecting position-arm 39 of carrier 36 is disengaged from contact with the bolt assembly and is free to move upwardly due to the urging of spring 41. This movement is effective to move the next cartridge which has been deposited on arm 38 of the carrier upwardly toward chamber 6. Finger lever 63, after it has been moved to the maximum extent away from the receiver, is returned to its original position by manual movement in the opposite direction. This movement is effective through rigid arm 69, stud 18, and locking plate 16, to move the bolt forward in the receiver toward its firing position. During its forward movement, nose portion 15 of bolt assembly 12 engages a cartridge positioned on arm 38 of the carrier and drives it into firing position in chamber 6. Bolt assembly 12 also engages arm 39 of the carrier 36 and cams the carrier 36 down into its cartridge receiving position.

The operation of the sensing lever 46 is clearly illustrated in FIGURES 5 and 6. In FIGURE 5, finger lever 63 is shown being rotated in the direction of the arrow toward the receiver. As the finger lever is moved toward the receiver, pin 73, .carried by the finger lever 63, engages the inturned portion 74 of the sensing lever 46. The initial engagement of pin 73, with inturned portion 74 of the sensing lever, is operative to rotate sensing lever 46 in a clockwise direction about its pivot pin 47. Since the sensing lever carries the scar 56 which is pivotally mounted thereto; sear 56 is rotated with the sensing lever. The clockwise rotation of the sear and sensing lever is effective to move portion 68A of the sear away from the lug 68, which is mounted on trigger 64. In this position, trigger 64 is inoperative to disengage sear 56 from hammer 45. Continued movement of finger lever 63 in the direction of the arrow brings the finger lever 63 into engagement with the hammer housing 30, as clearly indicated at 76 in FIG- URE 6. When the finger lever 63 is in abutting engagement with hammer housing 30, as shown at 76 in FIG- URE 6, the pin 73 rides up inturned portion 74 of the sensing lever and allows the sensing lever to rotate in a counterclockwise direction about its pivot pin into its operative position. 'Hammer spring 22 acts through hammer 45 and sear 56 to urge sensing lever 46 in a counterclockwise direction about pivot 47 when the hammer 45 is engaged by sear 56. This counterclockwise rotation of the sensing lever is effective to bring portion 68A of the sear S6 into engagement with lug 68 of trigger 64. In this position, a pull on the finger engageable portion 66 of the trigger is effective to rotate sear 56 out of engagement with hammer 45 and is designated the operative position of the sensing lever.

It is thus apparent that the sensing lever 46 is effective to render the firearm inoperative unless finger lever 63 has been fully closed into abutting engagement with hammer housing 39. Since the finger lever 63 operates the locking plate 16 by means of rigid arm 69, cam slot 70, and stud 18, it is apparent that the locking plate will lock the bolt assembly 12 in the receiver only when the finger lever 63 is in its fully closed position. This is the only position in which it is safe to fire the gun. Sensing lever 46 insures that the gun can only be fired in its fully safe position.

A second safety feature is provided by safety button 71, which also serves as the pivotal connection between the finger lever 63 and the hammer housing 30. Safety button '71 is axially slidable so that the recessed portion 72 of safety button 71 can be moved out of alignment with extension 67 of the trigger 64 and render the trigger immovable. This prevents the firing of this gun irrespective of the position of any other components.

This application has been described in detail with particular reference to a lever actuated firearm. It is apparent, however, that many of the features disclosed and claimed herein can be used in other types of firearms, such as semi-automatic and slide-actuated firearms. The claims thus are not to be construed as limited to lever actuated firearms.

It is anticipated that a variety of modifications and design changes may be devised in the disclosed embodiment of the invention without departing from the spirit and scope of the invention.

What is claimed is:

l. A firearm comprising a receiver, a barrel secured to the front of said receiver and having a chamber opening into said receiver, a buttstock secured to the rear of said receiver, bolt means including a firing pin, ejector, and extractor, slidably mounted in said receiver, locking plate means mounted in a recess in the upper face of said bolt means and adapted to be pivoted upwardly at one end into engagement with a recess in said receiver to lock said bolt means in said receiver, a downwardly extending arm formed integral with said locking plate and having a lug projecting therefrom, a hammer pivotally mounted in said receiver for movement from a firing position wherein said hammer engages said firing pin to a latched position wherein said hammer is engaged by a sear, spring means interposed between said hammer and said receiver and normally urging said hammer towards said firing position, sensing means pivotally mounted in said receiver and movable from an operative position to an inoperative position, a sear pivotally mounted on said sensing lever adapted to latch said hammer, said bolt means being operative to rotate said hammer in a counterclockwise direction against the force of said spring means as said bolt means is slidably moved in said receiver, a finger lever pivotally mounted on said receiver by pin means and normally abutting against said receiver, a lever arm rigidly secured to said finger lever, a cam slot in said lever arm engaging said lug on the locking plate whereby movement of said finger lever away from said receiver disengages said locking plate and imparts movement to said bolt means, a trigger pivotally mounted on said linger lever and operative to disengage said sear from said hammer only when said sensing means is in its operative position, means on said finger lever operative to engage said sensing means and move said sensing means to said inoperative position until the finger lever has been moved to a fully closed position, said spring means operative through said hammer to urge said sensing means to said operative position when the sear is engaged with said hammer.

2. A lever actuated rearm comprising a receiver having a hollow cavity formed therein opening on the bottom of the receiver, a barrel fastened to the front of the receiver and having a chamber opening into said receiver, a butt stock fastened to the rear of the receiver, bolt means slidably mounted in said receiver for movement from a firing position in which the bolt is in the front of the receiver to an ejecting position in which said bolt means is moved to the rear of the receiver, a locking plate mounted in the upper face of said b-olt means and movable from a position flush with the upper face of said bolt means to a locking position in which said plate is pivoted upwardly into engagement with a notch in said receiver, a hammer housing mounted in said receiver below said bolt means, a finger lever pivotally mounted on said hammer housing operative to pivot from a fully closed position in which the lever is positioned adjacent the butt stock to an open position in which the lever is moved away from said butt stock, a cam plate secured to said finger lever, said locking plate having a downwardly extending arm provided with a lug, a .cam slot in said cam plate engaging said lug and operable to pivot said locking plate into fiush engagement with the upper surface of said bolt means and to move means said bolt rearwardly to its ejecting position when said finger lever is moved to its open position, a trigger pivotally mounted on said lever and moveable therewith, a spring biased hammer pivotally mounted in said hammer housing and engageable by said bolt means, a sensing lever pivotally mounted in said hammer housing and having a portion extending rearwardly of said pivotal mounting operative to contact a pin on said finger lever to sense said open or closed position of said finger lever, a sear pivotally mounted on said sensing lever and operative to engage said hammer when the hammer is rotated to a latched position by the rearward movement of said bolt means, and a lug Vmounted on said trigger operative to release said sear from the hammer only when the sensing lever senses the fully closed position of said lever.

3. A firearm having a hollow receiver, a barrel secured to the front of said receiver and having a chamber therein communicating with the interior of said receiver, a butt stock secured to the rear of said receiver, bolt means slidably mounted in said receiver for movement from a firing position in which said bolt means is positioned in the front of the receiver sealing said chamber to an ejecting position in which said bolt means is positioned in the rear of said receiver, locking means carried by said bolt means engageable with a recess in the receiver to lock said bolt means in said receiver when said bolt means is in said firing position, a finger lever pivotally mounted on said receiver and movable from a closed position in which the finger lever abuts said butt stock to an open position in which said finger lever is rotated counterclockwise away from said butt stock, a hammer pivotally mounted in said housing and movable from a latched position to a firing position, a sensing lever pivotally mounted intermediate its ends in said housing and having a portion thereof engageable with said finger lever to sense the open or closed positions of said finger lever, said sensing lever being pivotable between a first position and a second position, sear means pivotally mounted on said sensing lever adapted to retain said hammer in said latched position, spring means mounted between said hammer and said housing normally urging said hammer toward said firing position, said spring means being operative when the hammer is: engaging said sear to rotate said sensing lever and sear about the sensing lever pivot to said first position, trigger means pivotally connected to said finger lever and operative to disengage said sear from said hammer only when said sensing lever is in said first position, means on said finger lever operative to rotate said sensing lever to said second position until said finger lever has reached a fully closed position.

4. In a firearm comprising a receiver, a sensing lever pivotally mounted in said receiver and movable by engagement with a finger lever from an operative position to an inoperative position, a finger lever pivotally secured to said receiver and movable from a fully closed position where said lever abutsthe receiver to an open position where the lever is moved away from said receiver, a sear pivotally mounted on said sensing lever and adapted to engage a spring biased hammer pivotally mounted in said receiver, means mounted in said receiver to rotate said spring biased hammer against the force of the spring into latched engagement with said sear, trigger means movably mounted on said finger lever operative to unlatch said sear from Said hammer only when said sensing lever is in said operative position, and means on said finger lever operative to engage said sensing lever to move said sensing lever to said inoperative position until said finger lever has reached said fully closed position.

5. In a firearm comprising a receiver, a finger lever pivotally secured to said receiver and movable from a fully closed position wherein said linger lever abuts the receiver to an open position wherein the finger lever is moved away from said receiver, a hammer pivotally mounted in said receiver and movable between a firing position and a latched position, spring means interposed between said hammer and said receiver normally urging said hammer to said firing position, means mounted in said receiver operative to rotate said hammer to said latched position, a sensing lever pivotally mounted in said receiver and engageable with said finger lever to sense the open or closed position of said finger lever, a Sear pivotally mounted on said sensing lever and adapted to engage and latch said hammer, a trigger pivotally mounted on said finger lever operative to unlatch said sear from said hammer only when said sensing lever indicates the closed position of said finger lever.

6. In a firearm comprising a receiver, a finger lever pivotally secured to said receiver and movable from a closed position wherein the finger lever abuts the receiver to an open position wherein the linger lever is moved away from the receiver, a sensing lever pivotally mounted in said receiver and having a portion engageable with said finger lever to sense the open or closed position of said finger lever, a sear pivotally mounted on said sensing lever, a trigger pivotally mounted on said finger lever and engageable with said se'ar only when said sensing lever indicates the closed position of said finger lever, and a firing means mounted in said receiver operative to be' latched by said sear and released by said trigger.

7. In a iirearm, a receiver, a bolt assembly mounted in said receiver for sliding movement from a firing position in the front of said receiver to an ejecting position in the rear of said receiver, a finger lever pivotally secured to said receiver, an arm rigidly secured to said finger lever and rotatable therewith, a cam slot in said arm, a locking plate carried by said bolt assembly and movable into and out of locking engagement with a recess in said receiver, and a stud on said locking plate engaging said cam slot in said arm, said stud and cam slot being the sole means for moving the locking plate into and out of locking engagement with a recess in the receiver and for moving the bolt from the firing position to the ejecting position and back again as the finger lever is manually rotated about its pivot.

8. In a lever actuated firearm comprising a receiver, a finger lever, axially slidable pin means pivotally mounting said finger lever on said receiver, a trigger pivotally mounted on said finger lever and movable therewith, a forward extension on said trigger engageable with said axially slidable pin means, a recess in said axially slidable pin means normally aligned with said extension and permitting pivotal movement of said trigger, said axially slidable pin means blocking the pivotal movement of said trigger when said recess is manually moved out of alignment with said extension by the axial movement of said pin means.

9. In a firearm, a receiver, a bolt assembly mounted in said receiver for sliding movement from a firing position in the front of said receiver to an ejecting position in the rear of said receiver, a locking plate mounted on said bolt and movable from a locking position wherein said locking plate simultaneously engages said bolt assembly and a recess in said receiver to an unlocked position in which said locking plate is generally fiush with the upper surface o-f said bolt, a finger lever pivotally secured to said receiver, a rigid arm on said finger lever extending toward said locking plate, cam means formed in said rigid arm operatively connected to said locking plate so that the rotation of said lever about the pivotal connection in one direction is effective to move said locking plate to its unlocked position and to move said bolt through the locking ,plate from its firing position to its ejecting position and return movement of said lever about its pivot being effective to move said bolt from its ejecting position to its firing position and to move said locking plate into its locking position.

10. Ina firearm, a receiver, a bolt assembly mounted in said receiver for sliding movement from a tiring position in the front of said receiver to an ejecting position in the rear of said receiver, a locking plate pivotally mounted in a recess in said bolt and movable from a locking position wherein said locking plate simultaneously engages la recess in said receiver and the recess in said bolt to an unlocked position in which said locking plate is substantially flush with said bolt, cam means movably mounted in said receiver, stud means operatively connecting said cam means to said locking plate and to said bolt through said locking plate, said cam means being operative to sequentially move said locking plate to its unlocked position to move said bolt from its firing position to its ejecting position and back to its firing position and to return the locking plate to its locking position as the cam means is moved in said receiver.

References Cited in the file of this patent UNITED STATES PATENTS 861,632 Brader July 30, 1907 864,608 Browning Aug. 27, 1907 2,606,383 Jensen Aug. 12, 1952 2,765,561 Morris Oct. 9, 1956 2,881,547 Butler Apr. 14, 1959 

9. IN A FIREARM, A RECEIVER, A BOLT ASSEMBLY MOUNTED IN SAID RECEIVER FOR SLIDING MOVEMENT FROM A FIRING POSITION IN THE FRONT OF SAID RECEIVER TO AN EJECTING POSITION IN THE REAR OF SAID RECEIVER, A LOCKING PLATE MOUNTED ON SAID BOLT AND MOVABLE FROM A LOCKING POSITION WHEREIN SAID LOCKING PLATE SIMULTANEOUSLY ENGAGES SAID BOLT ASSEMBLY AND A RECESS IN SAID RECEIVER TO AN UNLOCKED POSITION IN WHICH SAID LOCKING PLATE IS GENERALLY FLUSH WITH THE UPPER SURFACE OF SAID BOLT, A FINGER LEVER PIVOTALLY SECURED TO SAID RECEIVER, A RIGID ARM ON SAID FINGER LEVER EXTENDING TOWARD SAID LOCKING PLATE, CAM MEANS FORMED IN SAID RIGID ARM OPERATIVELY CONNECTED TO SAID LOCKING PLATE SO THAT THE ROTATION OF SAID LEVER ABOUT THE PIVOTAL CONNECTION IN ONE DIRECTION IS EFFECTIVE TO MOVE SAID LOCKING PLATE TO ITS UNLOCKED POSITION AND TO MOVE SAID BOLT THROUGH THE LOCKING PLATE FROM ITS FIRING POSITION TO ITS EJECTING POSITION AND RETURN MOVEMENT OF SAID LEVER ABOUT ITS PIVOT BEING EFFECTIVE TO MOVE SAID BOLT FROM ITS EJECTING POSITION TO ITS FIRING POSITION AND TO MOVE SAID LOCKING PLATE INTO ITS LOCKING POSITION. 